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Question
Give appropriate scientific reasons for Electrolysis is of molten lead bromide is considered to be a redox reaction.
Solution
In the electrolysis of molten lead bromide, the following reactions take place:
At the cathode: Pb2+ (l) + 2e- → Pb(l)
At the anode: 2Br- (l) → Br2 (g) + 2e-
Lead (II) ions (Pb2+) are attracted to the negative electrode, and the Pb2+ ions are forced to accept two electrons. Pb2+ ions are reduced. Bromide ions (Br-) are attracted to the positive electrode and the bromide ions are forced to give away their extra electron to form bromine atoms. Thus, bromide ions are oxidized. So, electrolysis of molten lead bromide is a redox reaction.
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